CN205798992U - For processing the vertical process center fixture in the uniform hole of bearing block - Google Patents

Abstract

A fixture of a vertical machining center for machining evenly distributed holes in a bearing seat, including a positioning device and a clamping device. The positioning device includes a base (1), a positioning step shaft (2) and a radial screw (4); the center of the base There is a groove; the positioning step axis is composed of a positioning bottom cylinder, a positioning outer cylinder and a positioning inner cylinder; the positioning bottom cylinder is embedded in the groove and fixed on the base by a fixing screw (10); There is a workpiece (3), and a radial threaded hole is provided on the positioning inner cylindrical surface; the clamping device includes an opening pressure plate (5), a clamping nut (6) and a double-ended stud (7), and one end of the double-ended stud is vertical It is fixed on the positioning inner cylinder; the opening pressing plate is placed on the workpiece through the double-headed stud, and the outer diameter of the clamping nut is larger than the opening width of the opening pressing plate. The utility model can not only reduce the labor intensity of workers' operation and improve the production efficiency, but also can realize the automatic processing of uniformly distributed holes and ensure the processing accuracy of uniformly distributed holes.

Description

Vertical Machining Center Fixture for Machining Uniformly Distributed Holes in Bearing Seats

technical field

The utility model relates to the field of mechanical processing, in particular to a milling machine processing jig, in particular to a vertical machining center jig used to process evenly distributed holes in a bearing seat.

Background technique

At present, the uniformly distributed holes on the bearing seat are mainly processed by drilling machines. This processing method requires the design of multi-station drilling templates for vertical drilling machines for positioning, guiding, clamping and indexing. The fixture needs an indexing device. The mold structure is very complicated, the labor intensity of the workers is high, the production efficiency is low, the processing quality cannot be guaranteed, and rework often occurs.

Contents of the invention

The utility model provides a fixture of a vertical machining center for processing evenly distributed holes in a bearing seat. The fixture can not only greatly reduce the labor intensity of workers' operation, improve production efficiency, but also realize automatic processing of uniformly distributed holes, ensuring Machining accuracy of evenly distributed holes.

In order to achieve the above object, a vertical machining center fixture for processing evenly distributed holes in a bearing seat includes a positioning device and a clamping device. The positioning device includes a base, a positioning step shaft and a radial screw; the center of the base A groove is provided; the positioning step shaft is composed of a positioning bottom cylinder, a positioning outer cylinder and a positioning inner cylinder, and the outer diameters of the positioning bottom cylinder, the positioning outer cylinder and the positioning inner cylinder are successively reduced; the positioning step shaft The positioning bottom cylinder is embedded in the groove of the base and fixed on the base by fixing screws; the positioning outer cylindrical surface is covered with workpieces, and the positioning inner cylindrical surface is provided with radial threads that are compatible with radial screws hole; the clamping device includes an opening pressing plate, a clamping nut and a double-ended stud, one end of the double-ended stud is vertically fixed on the center of the upper end face of the positioning inner cylinder; the opening pressing plate passes through the double-ended stud Placed on the workpiece, the clamping nut is screwed on the other end of the stud, and the outer diameter of the clamping nut is larger than the opening width of the opening pressing plate.

Further, the clamp also includes at least two limit pins, one end of the limit pin is vertically fixed on the upper end surface of the positioning inner cylinder, and the limit pins are all located on the opening side of the opening pressing plate and aligned with the upper and lower sides of the opening pressing plate. The two parts are in contact.

Preferably, there are three fixing screws and they are evenly distributed on the end surface of the positioning bottom cylinder of the positioning step shaft.

Preferably, the clamp is fixed on the workbench of the three-axis vertical machining center through a vise and spacers.

Compared with the prior art, the utility model adopts the vertical machining center to realize the automation of the whole process of drilling the central hole, drilling the bottom hole and tapping the uniformly distributed holes on the end surface of the bearing seat. The structure of the fixture is simple and the labor intensity of the operation is reduced. , improve work efficiency, and ensure the machining accuracy of evenly distributed holes in the workpiece.

Description of drawings

Fig. 1 is the top view of the utility model;

Fig. 2 is a sectional view along line A-A in Fig. 1;

In the figure: 1. base, 2. positioning step shaft, 3. workpiece, 4. radial screw, 5. opening pressure plate, 6. clamping nut, 7. double-ended stud, 8. limit pin, 9. uniform Cloth hole, 10, fixing screw.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figures 1 and 2, a vertical machining center fixture for machining uniformly distributed holes in a bearing seat includes a positioning device and a clamping device, and the positioning device includes a base 1, a positioning step shaft 2 and a radial screw 4 The center of the base 1 is provided with a groove; the positioning step shaft 2 is composed of a positioning bottom cylinder, a positioning outer cylinder and a positioning inner cylinder, and the outer diameters of the positioning bottom cylinder, the positioning outer cylinder and the positioning inner cylinder are in order Reduced; the positioning bottom cylinder of the positioning step shaft 2 is embedded in the groove of the base 1 and fixed on the base 1 by the fixing screw 10; the workpiece 3 is set on the positioning outer cylindrical surface, and the positioning inner cylindrical surface A radial threaded hole compatible with the radial screw 4 is provided; the end surface of the positioning bottom cylinder and the positioning outer cylinder position the workpiece 3, limiting the 5 degrees of freedom of the workpiece 3, and the radial screw 4 is on the workpiece. 3 Carry out further positioning, limit the degree of freedom of the rotation of the workpiece 3 around the center of the positioning step axis 2, and limit the 6 degrees of freedom of the workpiece 3 in total, and meet the positioning requirements of the CNC machining of the uniformly distributed holes of the workpiece 3;

The clamping device includes an opening pressing plate 5, a clamping nut 6 and a stud 7, one end of the stud 7 is vertically fixed on the center of the upper end face of the positioning inner cylinder; the opening pressing plate 5 passes through the double-ended The head stud 7 is placed on the workpiece 3, and the clamping nut 6 is tightened on the other end of the stud 7. The outer diameter of the clamping nut 6 is greater than the opening width of the opening pressing plate 5; The clamping and loosening of the workpiece 3, the opening structure of the opening pressure plate 5 greatly shortens the working stroke of the clamping nut 6 clamping and loosening, and realizes the rapid loading and unloading of the workpiece 3.

In order to realize faster and more accurate positioning of the opening pressing plate 5, the clamp also includes at least two limit pins 8, one end of the limit pins 8 is vertically fixed on the upper end surface of the positioning inner cylinder, and the limit pins 8 are each It is located on the opening side of the opening pressing plate 5 and is in contact with the upper and lower parts of the opening pressing plate 5 .

In order to save processing cost and make the positioning step shaft 2 more firmly fixed on the base 1, the number of fixing screws 10 is three and evenly distributed on the positioning bottom cylinder end surface of the positioning step shaft 2.

The fixture is fixed on the workbench of the three-axis vertical machining center through a flat vise and pads.

Before processing, first put the positioning bottom cylinder of the positioning step shaft 2 into the groove of the base 1, and then further fix the positioning step shaft 2 by the fixing screw 10, so as to realize the positioning of the positioning step shaft 2 on the base 1; Then fix the vertical surface of the jaws with a flat-mouth vise for alignment, and clamp and fix it on the workbench of the machining center, and clamp the utility model on the flat-mouth vise; , Y-axis center tool setting, the Z coordinate axis tool setting is performed on the top surface of the positioning inner cylinder of the positioning step axis 2, and the reference zero point of the tool machining movement is established.

Then, the workpiece 3 is set on the positioning outer cylindrical surface of the positioning step shaft 3, so that the radial threaded hole on the positioning outer cylinder is approximately aligned with the radial threaded hole on the positioning step shaft 2, and the radial screw 4 is slightly screwed into the Locate the radial threaded hole on the step shaft 2, so as to realize the correct positioning of the workpiece 3; place the opening pressure plate 5 through the double-ended stud 7 on the workpiece 3, and push it to the direction of the limit pin 8, and the two limit pins Position pin 8 and double-ended stud 7 determine the precise position of opening pressure plate 5, use a wrench to rotate clamping nut 6 clockwise to press opening pressure plate 5, so as to realize fast clamping of workpiece 3, and then ensure that the bearing seat will not follow It is loosened during the machining process, so as to ensure that its position remains unchanged, thereby ensuring the machining accuracy of uniformly distributed holes.

Finally, the machining center runs the numerical control program of evenly distributed holes to complete the numerical control automatic machining of center hole drilling, thread bottom hole drilling and tapping. After the machining is completed, unscrew the radial screw 4 and remove it, and use a wrench to rotate counterclockwise to clamp The nut 6 unclamps the opening pressing plate 5, and the fast removal of the workpiece 3 can be realized.

Claims (4)

1., for processing the vertical process center fixture in the uniform hole of bearing block, including positioner and clamping device, it is special Levy and be,

Described positioner includes base (1), positioning step axle (2) and radial screw (4)；The center of described base (1) is provided with Groove；Described positioning step axle (2) is consisted of integrative-structure by cylinder in location end cylinder, location outside cylinder and location, location In end cylinder, location outside cylinder and location, the external diameter of cylinder is sequentially reduced；Cylinder at the bottom of the location of described positioning step axle (2) embeds In the groove of base (1) and it is fixed on base (1) by fixing screw (10)；It is cased with workpiece on the external cylindrical surface of described location (3), described location inner cylinder face is provided with the radial screw bore suitable with radial screw (4)；

Described clamping device includes opening pressing plate (5), binding nut (6) and studs (7), the one of described studs (7) End is perpendicularly fixed in the upper surface of the interior cylinder in location in the heart；Described opening pressing plate (5) is placed on workpiece through studs (7) (3) on, described binding nut (6) is tightened against the other end of studs (7), and the external diameter of binding nut (6) is more than opening pressing plate (5) A/F.

A kind of vertical process center fixture for processing the uniform hole of bearing block the most according to claim 1, its feature exists In, also include that at least two spacer pin (8), one end of described spacer pin (8) are perpendicularly fixed on the upper surface of the interior cylinder in location, Spacer pin (8) is respectively positioned on the opening side of opening pressing plate (5) and contacts with two parts up and down of opening pressing plate (5).

A kind of vertical process center fixture for processing the uniform hole of bearing block the most according to claim 1 and 2, its feature Being, described fixing screw (10) is on three and cylinder end face at the bottom of being evenly distributed on the location of positioning step axle (2).

A kind of vertical process center fixture for processing the uniform hole of bearing block the most according to claim 1 and 2, its feature Being, described fixture is fixed on three shaft vertical machining center workbench by parallel jaw and cushion block.